rado wrote: >But my goal is to be >able to test the raid system by just unplugging hda to mimic a faulty >drive and have it just carry on and boot from hdc. > >md0 = hda1/hdc1 /boot (primary boot partitions on both drives) >md1 = hda2/hdc2 / > Can't you just do a software test: raidsetfaulty /dev/md1 /dev/hdc2 (for example) Check out the LDP http://www.tldp.org/HOWTO/Software-RAID-HOWTO-6.html#ss6.3 for details including how to add the disk back to the array. -- Paul (ganci at nurdog.com)